Speed Signal Circuit [10/2013 - ]: Procedure

1. Disconnect the D9 combination meter assembly connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   D9-9 (+S) - Body ground	Engine switch on (IG)	4.5 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Rear view of wire harness connector (to Combination Meter Assembly)

   HINT: 

   If any of the ECUs specified in the wiring diagram supplies power to the combination meter assembly, the combination meter assembly will output a waveform.

NG → See step   5 

OK: Go to next step 

1. Reconnect the D9 combination meter assembly connector.
2. Disconnect the A30 brake actuator assembly (skid control ECU) connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A30-2 (SP1) - Body ground	Engine switch on (IG)	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Brake Actuator Assembly (Skid Control ECU))

NG → See step   4 

OK: Go to next step 

1. Check the input waveform.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   1. Reconnect the A30 brake actuator assembly (skid control ECU) connector.
   2. Remove the combination meter assembly with the connector(s) still connected.
   3. Connect an oscilloscope to terminal D9-8 (SI) and body ground.
   4. Turn the engine switch on (IG).
   5. Turn a wheel slowly.
   6. Check the signal waveform according to the condition(s) in the table below.

      Item	Condition
      Tool setting	5 V/DIV., 20 ms./DIV.
      Vehicle condition	Engine switch on (IG), wheel being rotated

      OK

      The waveform is similar to that shown in the illustration.

      TEXT IN ILLUSTRATION
      
      

      *a	Component with harness connected (Combination Meter Assembly)

      HINT: 

      When the system is functioning normally, one wheel revolution generates 4 pulses. As the vehicle speed increases, the width indicated by (A) in the illustration narrows.

NG → See step   18 

OK → See step   19 

1. Disconnect the D9 combination meter assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D9-8 (SI) - A30-2 (SP1)	Always	Below 1 Ω
   D9-8 (SI) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   19 

1. Disconnect the D100 No. 6 junction connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D9-9 (+S) - D100-1	Always	Below 1 Ω
   D9-9 (+S) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Inspect for a short in the wire harnesses and connectors connected to the No. 6 junction connector shown in the wiring diagram.

   HINT: 

   If voltage is not present, it is possible that an ECU or circuit has a malfunction. The malfunctioning ECU or circuit will be diagnosed in the following steps.

   1. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection	Condition	Specified Condition
      D100-2 - Body ground	Engine switch on (IG)	4.5 to 14 V
      D100-3 - Body ground	Engine switch on (IG)	4.5 to 14 V
      D100-5 - Body ground	Engine switch on (IG)	4.5 to 14 V
      D100-9 - Body ground	Engine switch on (IG)	4.5 to 14 V

      Result

      Result	Proceed to
      Voltage is not present in one circuit.	A
      Voltage is present in all of the circuits.	B

B → REPLACE NO. 6 JUNCTION CONNECTOR (NO. 6 JUNCTION CONNECTOR) 

A: Go to next step 

1. Select the circuit for which voltage was not present in step 6.

   Result

   Tester Connection	System that uses the circuit	Proceed to
   D100-2 - Body ground	Smart key system	A
   D100-5 - Body ground	Auto wiper system*1	B
   D100-3 - Body ground	SFI system, Automatic transaxle system or Automatic headlight beam level control system*2	C
   D100-9 - Body ground	Audio and visual system*3, *4, Navigation system*3, *5 or Safety connect system*6	D

   • *1: w/ Auto Wiper System
   • *2: w/ Automatic Headlight Beam Level Control System
   • *3: for Radio and Display Type
   • *4: for 11 Speakers
   • *5: for Navigation Receiver Type
   • *6: w/ Manual (SOS) Switch

B → See step   9 

C → See step   10 

D → See step   14 

A: Go to next step 

1. Disconnect the D64 certification ECU (smart key ECU assembly) connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D64-27 (SPD) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   20 

1. Disconnect the D54 windshield wiper relay assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D54-24 (SPD) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   28 

1. Select the circuit for which voltage was not present in step 6.

   Result

   Tester Connection	System that uses the circuit	Proceed to
   D100-3 - Body ground	SFI system	A
   	Automatic transaxle system	B
   	Automatic headlight beam level control system*1	C

   • *1: w/ Automatic Headlight Beam Level System

B → See step   12 

C → See step   13 

A: Go to next step 

1. Disconnect the A18 ECM connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A18-10 (SPD) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   26 

1. Disconnect the B2 transmission control ECU assembly (TCM) connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   B2-3 (SPD) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   25 

1. Disconnect the A24 headlight leveling ECU assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A24-16 (SPDR) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   23 

1. Select the circuit for which voltage was not present in step 6.

   Result

   Tester Connection	System that uses the circuit	Proceed to
   D100-9 - Body ground	Audio and visual system*1	A
   	Safety connect system*2	B
   	Audio and visual system*3 or Navigation system*3, *4	C

   • *1: for 11 Speakers
   • *2: w/ Manual (SOS) Switch
   • *3: for Radio and Display Type
   • *4: for Navigation Receiver Type

B → See step   16 

C → See step   17 

A: Go to next step 

1. Disconnect the E10 stereo component amplifier assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E10-11 (SPD) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   22 

1. Disconnect the E11 DCM (telematics transceiver) connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E11-10 (SPDP) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   27 

1. Disconnect the E5*1 radio and display receiver assembly or E20*2 navigation ECU sub-assembly connector.
   • *1: for Radio and Display Type
   • *2: for Navigation Receiver Type
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   for Radio and Display Type 

   for Navigation Receiver Type 

   Tester Connection	Condition	Specified Condition
   E5-17 (SPD) - Body ground	Always	10 kΩ or higher

   Tester Connection	Condition	Specified Condition
   E20-17 (SPD) - Body ground	Always	10 kΩ or higher

   Result

   Result	Proceed to
   OK (for Radio and Display Type)	A
   OK (for Navigation Receiver Type)	B
   NG	C

B → See step   21 

C → REPAIR OR REPLACE HARNESS OR CONNECTOR 

A → See step   24